You have a nice benchmark for the package, maybe try throwing charges and see what you get.
FWIW, two of my measures are Redding, and I couldnt be happier with them. I had the first since about the beginning, then bought the second at a gun show for about $25 (

). No. 3 is an old Herters, futzy to set, but consistent once there. I like to have my powders set to go in their own measure.
I used to use rod powders but havent in years. Sure cant argue with your shooting though, keep it up!
Oh, and No.4 was an indulgence, a Belding & Mull, very expensive and very accurate, especially for black powder, and would probably work well for rod powder too. Its an old traditional design well suited to my BP match rifles.